Some ShockWave Flash files (.swf) might be exported in a form of a raster image (.png). However, that will create a static bitmap image, not the like original file which is animated and vector based. Used only for exporting image purposes. Such swf to png conversion might be done in many programs that work with ShockWave format.
Open SWF file Open PNG fileA multifunctional media converter for Windows
A dedicated conversion software
A multimedia conversion software